Reflection* doesn't define their __sleep/__wakeup methods.  so change to FR 
instead of a bug

This would be very useful, however I can see why this may be problematic for internals. If the class definition has changed since the reflection object was serialized and unserialzed, then it would cause all sorts of issues. The only sensible thing that __wakeup could do is call __construct, and in actual fact, this works:


class A {
		public function __construct() {
		}	
}


$r = new ReflectionClass('A');

$s = serialize($r);

$r1 = unserialize($s);

$r1->__construct('A');

$a = $r1->newInstanceArgs();

var_dump($a);



So having __wakeup call __construct with the class name would allow reflection to be serialized, if like me, you were hoping to cache reflection using memcached for performance reasons, serialization in this manner would not be beneficial as it would be just as slow to unserialize as to construct a new object.

Indeed, this feature request is somewhat doubtful, and as such
needs to be discussed.  If anyone is still interested in having
this, please pursue the RFC process[1].  For the time being, I'm
suspending this ticket.

[1] <https://wiki.php.net/rfc/howto>